I agree with everyone here that enclosed is probably best for a 3D Printer in school. There are quite a few options for this. Here are a few I would recommend.

AIO Robotics Zeus
https://www.3dprinteruniverse.com/co...eus-3d-printer

Zortrax M200
https://www.3dprinteruniverse.com/co...200-3d-printer

Flashforge series
https://www.3dprinteruniverse.com/co...s?q=Flashforge

And lastly, even though it is not enclosed it is easy to use and quite cheap allowing you to get multiple printers

M3D The Micro
https://www.3dprinteruniverse.com/co...cro-3d-printer

Here is a 5% off coupon for any 3D Printer as well. Use code ZAKI7ZKFSB7Q

Let me know if there is anything else you may be interested in and I'll see if I can get you a discount.